Changeset 615 for soft/giet_vm/giet_kernel

Timestamp:

Jul 15, 2015, 6:17:41 PM (9 years ago)

Author:

bellefin

Message:

Introduce mmc distributed lock
The locks are distributed in the kernel heaps (one lock in each cluster) and there is a global table in the kernel data segment which contains the addresses of all the locks.
The _mmc_boot_mode variable is defined in boot.c and kernel_init.c and defines which kind of lock is used.
The distributed locks are initialized inside the kernel_init() function.

File:

• soft/giet_vm/giet_kernel/kernel_init.c (modified) (2 diffs)

soft/giet_vm/giet_kernel/kernel_init.c

@@ -113 +113 @@
 unsigned int   _tty0_boot_mode = 0;
 
+// Kernel uses distributed locks to protect MMC   
+__attribute__((section(".kdata")))
+unsigned int   _mmc_boot_mode = 0;
+
 // Kernel uses sqt_lock to protect command allocator in HBA        
 __attribute__((section(".kdata")))
@@ -161 +165 @@
 #if GIET_DEBUG_INIT
 _nolock_printf("\n[DEBUG KINIT] P[%d,%d,%d] completes kernel heap init\n", x, y, p );
+#endif
+        //////  distributed lock for MMC
+        _mmc_init_locks();
+
+#if GIET_DEBUG_INIT
+_nolock_printf("\n[DEBUG KINIT] P[%d,%d,%d] completes MMC distributed lock init\n", x , y , p );
 #endif
         //////  distributed lock for TTY0